just copied the 0.31.1 ebuild and changed SRC_URI because it's .tar.bz2 now. seems to work. Reproducible: Always Steps to Reproduce:
Created attachment 48546 [details] new ebuild :)
Created attachment 56263 [details] desklet-starterbar-0.31.3.ebuild The old 0.31.1 ebuild seem to work for the new 0.31.3 starterbar. But I am quiet not sure if the PyXDG dependency is still neede in the ebuild ?! "The new version 0.9 of PyXDG is no longer compatible with StarterBar. So I put PyXDG 0.8 into the StarterBar sensor to make it work again. This also means, that a separate PyXDG package isn't required anymore."
You wouldn't need it in RDEPEND anymore if this were actually going to be implemented. See bug 88123 for my explanation why.
Latest is in portage now, please update.